One note written to Luigi Mangione read in part, "know there are thousands of people wishing you luck," prosecutors said in court documents.

In filings, lawyers for the man accused of assassinating a health care executive argued with prosecutors over special treatment and his access to evidence.

Suspected UnitedHealthcare CEO assassin Luigi Mangione allegedly received "heart-shaped notes" hidden in fresh socks before a February hearing, prosecutors say.

The note — plus another heart-shaped message addressed to someone called “Joan” — was hidden in a piece of cardboard at the center of a new pair of Argyle socks, Seidemann wrote. It’s not clear who wrote the note or slipped it into the socks. The filing didn’t say, and prosecutors later declined to elaborate.

Luigi Mangione, the 26-year-old charged in the killing of UnitedHealthcare CEO Brian Thompson, declined to wear a pair of argyle socks gifted by a fan for a court appearance because he thought they didn't look good—despite the socks containing heartfelt messages of support, prosecutors said in a new batch of court filings released Wednesday.

Prosecutors said Mangione received a heart-shaped note tucked into a pair of socks last month, offering encouraging words for his upcoming trial.

The socks were included in clothes his defense team gave him for a hearing in Manhattan last month, the Manhattan district attorney's office said.

Luigi Mangione’s fashion choices at his latest court appearance have caught the attention of Manhattan prosecutors who are accusing his lawyers of encouraging the publicity around him.

The note to Mangione, accused killer of UnitedHealthcare CEO Brian Thompson partly read: “know there are thousands of people wishing you luck,” according to Wednesday’s court filing.